Furnace-front.



W. A. WHITE.v

FURNACE FRONT.

APPLICATION FILED MAR. 9, 1914,

Patented M21122, 1915.

LESUJQQ,

. inlets, also a rack upon said shutter and a gear segment with handleto operate the WILLIAM' ALBERT WHITE, OF NEW YORK, N. Y.

FURNACE-FRONT.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed March 9, 1914. Serial No. 823,513.

To all whom it may concern:

Be it known that 1, WILLIAM A. WHITE, a citizen of the United States,and resident of the borough of Manhattan, in the city, county, and Stateof New York, have invented, certain new and useful Improvements inFurnace-Fronts, of which the following is a specification.

This invention relates to furnaces for burning liquid hydrocarbon and myimprovements have particular relation to a novel construction of furnacefront; the ar rangement thereof whereby the air supplied to the furnaceis conducted through said front to be preheated therein prior tocombustion, and the novel and conveniently handled means whereby theadmission of air is regulated and controlled.

With these objects in view my invention consists of a hollow front whichis convex or extended outwardly from the forward portion of the furnacein concentrically. diminishing area, to thereby increase the air heatingcapacity and the furnace capacity with the sacrifice of a minimum amountof stokehold space in so doing. The said hollow front is adapted toreceive air, whether under natural draft or forced draft, at itsperiphery, which has spaced inlets extending completely around it, and Iprovide a revolving shutter to regulate the size of said same.

The inner wall of the hollow, air conducting front has a circularopening into the furnace, from which opening there extends inwardly aconstricted air supply tube, which said front has a circular opening ofequal diameter, which is occupied by an approximately cone faced closurewhich is hinged to said outer wall in -manner to swing outwardly, sothat when the air supply tube and closure are both swung, upon theirhinges, access of maximum capac1ty can be had to the furnace interior.The closure aforesaid supports a tube,'inwardly directed, and carryingat its inner end; a deflector whose major diameter is normallyapproximately in the transverse plane of the inward periphery of theair'supply tube. Said do fiector is capable of adjustment along itssupport, but I am relying mainly upon the pacity suited to the furnace,it is better to avoid as far as possible the opportunity for users, whomay be unskilled, from tampering with the adjustment.

The hollow front may be provided with main vanes in shallow S-curves,extending from the periphery of said front, at which the air isadmitted, tangentially to the central space which is bounded by theinner peripheries of the walls of the front, whereby the air movescircularly in said central space and in its passage through the airsupply tube. Shorter vanes are provided intermediate the outer portionsof the main vanes to afford additional heating surface.

Other features and objects of my invention will appear in the followingdescription.

In the drawings:-Figure 1 is 'a vertical section of my improved furnacefront. Fig. 2 is a partial face view thereof, partly broken away, andFig.3 is a detail of the air regulating means.

The furnace or combustion chamber to which my improved front is appliedmay be of ordinary character, the forward portion only of such furnacebeing here shown and represented by the numeral 1. To the forward end ofsaid furnace is attached, in

usual manner, the inner wall 2 of the front,

sented to the furnace, thereby providing 1ncreased furnace space forcombustion within the confines of such extended contour. Said inner wall'2 may be of straight inclined section from the point of its greatestinward diameter to a point near its central periphery, as seen in Fig.1, in solid lines. Or it may be of outwardly curved section, as seen indotted lines in said Fig. 1, or it may be of other suitable outwardlyextended, diminishing contour. As shown, said wall has an outward,annular, vertical flange 3 by which the front is secured to the furnace,and an inner, centering, vertical portion 4 whose periphery forms thecentering terminal thereof. An outer wall 5 is shown as following thecontour of wall 2, being spaced therefrom correctly to provide an airpassage of proper capacity. Said Wall 5 may be of sheet metal and isconnected to wall 2 by being mounted on vanes 6, 7 which projectedgewise from wall 2. Said vanes 6, be cast integrally with said wall 2,that being the mode of construction found most dosirable. The wall 5,being also in form of anannulus, hasits outer periphery lying near theouter periphery of wall 2, and between the two walls, around them, thevanes 6, 7, have enlarged heads 8, separated circumferentialy from eachother, to provide spaces 9 therebetween to-serve as eripheral air inletsto said hollow front. K circular band or shutter 10, encircling theheads 8 and spaces 9, has openings 11, to register with spaces 9 to openthe latter wide, or to close orpartially close said spaces in turning,to thereby shut off or regulate the supply of air to the front andfurnace. A rack section 12 is secured as by screws 13, to band 10 at agiven point in its circumference, and a gear sector 14, fulcrumed at 15to a bracket 16, and having a handle 17, is meshed with said rack, tomove said rack and band and thereby regulate the air supply to. thefront. The vanes 6, which extend inwardly to divide'the space betweenwalls 2 and '5 into inwardly directed passages, are tangentiallyarranged relatively to the central space bounded by' the innerperipheries of said walls. Said vanes 6 are of substantially shallow Sconformation and provide heating surfaces besides directing tangentiallyinwardly the air which is received at the regulated peripheral openings.Because of the greater circumferential distance between the vanes 6 attheir outer portions than exists between their inner portions, Isupplement said vanes with a series of shorter vanes 7, which extendinwardly only about half way through the diameter compassed between thewalls 2, 5, the vanes 7 roviding still further heating surfaces or theentering air.

Mounted upon the inner wall 2, as by a hinge 18, is a constricted airsupply tube 19 which extends from the interior surface of said wall, orthat surface thereof which is directed toward the furnace interior, theabutting-portion-of said tube 19, which may be a flange 20, lyingnormally against said wall interior surface about its edge, and havingfastening means therewith of usual character, as the boltand winged nut21 indicated. With said fastening released the tube 19 is adapted toswing inwardly'within .the furnace upon-its hinge 1.8 to remove it mayof said deflector being its further inward travel between as anobstruction to the full clearance of the circular opening in wall2. Thedotted lines in- Fig. 1 show the tube 19 as fully opened inwardly.

A substantially cone faced member 22 is hinged as at 23 to the externalsurface of wall 5, near its iImer peripheral'edge, said member 22normally filling and closing the circular opening in said wall 5, saidmember 22 having a fastening of usual character as the bolt'and wingednut 24, with said wall, and being adapted to swing outwardly, whenreleased, to fully uncover said circular opening in wall 5, to removesaid member 22 as an obstruction to the full clearance of the circularopening in said wall 5. Dotted lines in Fig. 1 show the fully openedposition of member 22.

The inwardly directed, substantially coneshaped central portion 25, of--member 22 is directed toward the rear portion of the constricted tube19, and forms therewith an annular passage for the air received from thetangential passages in thefront for delivery to the furnace through theconstricted .tube 19. Mounted in. a central hub portion 26 of member 22is a tube 27 which is thus axially arranged with respect to the furnacefront, the inner end of said tube lying in substantially the verticalplane of the constricted portion of tube 19. Said tube 27 has internalprotuberances or points 28 whereby a burner tube 29 carried within saidtube 27 may be centered therein, said.

burner tube, which is introduced to said supporting tube 27 through anouter tubular passage 30 therefor in the member 22, is of Such length,and so-adjusted,'that its nozzle 31 is about even with the inner end oftube 27, and thus is also in substantially the vertlcal planeof theconstricted portion of tube 19. The tube 27 has mounted thereon, aboutits forward end, a bell shaped deflector 27 for the passage therethroughof fuel from the burner nozzle, the larger diameter directed toward thefurnace interior, and the major eripheral diameter of said deflectorlying su tantially in :the vertical plane of the inward peripheral edgeof the tube 19.

Under the construction disclosed the cient mixture of fuel and air isprovided at" the mouth of the deflector, the heated air traveling in aspiralabout the axis formed by the tube 27 and deflector 27, acquiringincreased velocity at the constricted portion of tube 19 and maintainingthat velocity in the outwardly flaringinward wall of said tube 19 andthe concentric, correspondingly inclined wall of deflector 27, some ofthe air entraining over the peripheral edge of thetortmeotthefuelissumgfromits mouth. As is known, the fuel may be travelingin a spiral opposite to the direction of spiral travel of the air.

I claim:

1. -A hollow furnace front having regulated means all around itsperiphery for the reception of air, passages in said front, saidpassages extending inwardly from said reception means through the majorportion of the radius of said front, and conducting the received airtangentially therethrough with respect to its axis, and a centralopening communicating from the front to the furnace.

2. A hollow furnace front having regu lated means all around. itsperiphery for the reception of air, passages in said front, saidpassages extending inwardly from said reception means through the majorportion of the radius of said front, and conducting the received airtangentially therethrough with respect to its axis, and 'a constrictedsupply tube communicating from the center of said front to the furnace.

I tween said air passages and the furnace.

4. The combination with a furnace of a hollow front therefor, and asupply tube for conducting air from said front to the furnace, saidsupply tube being hinged to the inner wall of said front, to swing intothe furnace.

5. The combination with a furnace of a hollow front therefor and aconstricted sup ply tube for conducting air from said front to saidfurnace, said constrictedv supply tube being hinged to the inner wall ofsaid front to swing into the furnace.

6. The combinationwith a furnace of a hollow front therefor of outwardlytapering. contour, and a constricted supply tube for conducting air fromsaid front to said furnace, 'said supply tube being hinged to the innerwall of said front, to swing into the furnace. 1

7. The combination with a furnace of a hollow front therefor ofoutwardly tapering contour, a constricted supply tube for conducting airfrom said front to said furname, and a cone like member carried by theouter wall of said front to co-act with said constricted tube inproviding an annular inclined passage communicating from said front tothe furnace, said cone like member being hinged to said outer wall toswing outwardly therefrom. v

8. The combination with a furnace of a hollow front for the passage ofair to the furnace, an air supply tube hinged to the inner wall of saidfront to swing into the furnace, and a front closure hinged to the outerwall of the front to swing outwardly.

9. The combination with a furnace of a hollow front for the passage ofair to the furnace, a constricted supply tube hinged to the inner wallof said front to swing into the furnace, and a cone faced closure hingedto the outer wall of the front to swing outwardly, said tube andclosure, when closed, co-acting to form an annular inclined passagebetween the front and furnace.

10. A hollow furnace front having regulated peripheral inlets and airpassages extending tangentially inwardly from said inlets, an inwardlyopening constricted supply tube hinged to the inner wall of the front,an outwardly opening closure hinged to the outer wall of said front,said closure having a cone-like face directed toward said supply tube, atube'axially borneby said closure to support a burner, the nozzle ofsaid burner and inward end of said tube lying substantially in thevertical plane of the constricted portion of said supply tube,

and a bell shaped deflector, carried by said burner supporting tube withits peripheral edge lying substantially in the vertical plane of theinward periphery of said supply tube.

Signed at the borough of Manhattan in the city, county, and State of NewYork this 5th day of March A. D. 1914.

WILLIAM ALBERT WHITE.

